Description
Product Overview
The KONGSBERG RDIOR400, part number 600950, is a Remote Digital Input/Output and Relay Module designed for the Kongsberg RIO400 remote I/O system. It provides an interface between the Serial Process Bus (SPBus) and field-side digital input/output signals, allowing remote equipment to communicate with a controller computer.
The module supports individually configured digital I/O together with relay outputs. Its dual SPBus interfaces can provide redundant communication paths, while built-in monitoring and diagnostic functions help identify wiring, communication, and I/O-related faults. Kongsberg documentation identifies the RDIO/RDIOR400 family as an interface for remote devices such as valves, relays, and other field equipment.
Key Features
- Remote digital input/output interface for Kongsberg RIO400 systems
- Part number: 600950
- Model: RDIOR400
- Up to 16 configurable solid-state digital inputs or outputs
- 16 digital relay outputs on the documented RDIOR400 hardware version
- Dual SPBus A/B interfaces for optional communication redundancy
- Galvanically isolated SPBus interfaces
- DIN-rail mounting with plug-in field connections
- Front status indication for operating and fault conditions
- Loop monitoring for solid-state I/O
- Relay coil monitoring
- Built-in self-diagnostics and fault identification
- Short-circuit-protected I/O loop drivers
- Fail-safe output activation behavior following communication loss
- Local terminal interface for commissioning and troubleshooting
Technical Datasheet
| Parameter | Specification |
|---|---|
| Brand | Kongsberg / Kongsberg Simrad |
| Model | RDIOR400 |
| Part Number | 600950 |
| Product Type | Remote Digital I/O and Relay Module |
| Digital I/O | Up to 16 configurable digital inputs or outputs |
| Relay Outputs | 16 digital relay outputs |
| Process Bus | Dual SPBus A / SPBus B |
| SPBus Line | RS-485 multidrop |
| SPBus Isolation | 500 V, optocoupler |
| SPBus Bandwidth | Up to 2.083 MHz |
| Power Supply | 10–28.8 VDC |
| Local Terminal | RS-232 |
| Watchdog Timeout | Programmable, maximum 6.0 s |
| Mounting | DIN rail |
| Protection Class | IP20 |
| Dimensions | Approx. 355 × 157 × 87 mm |
| Weight | Approx. 1.35 kg |
Specifications above are based primarily on the available Kongsberg/Simrad RDIOR400 hardware documentation. Revision-specific characteristics should be checked against the identification label before replacement.
I/O and Communication
The RDIOR400 works as a field interface rather than as a standalone PLC CPU. Field-side signals are connected to the module, while the controller communicates with the remote I/O system through SPBus.
The documented hardware provides two SPBus connections, allowing a redundant communication arrangement when supported by the overall system. Each bus interface is electrically isolated from the other circuitry.
The module also includes a local RS-232 terminal interface. This can be useful during commissioning, diagnostics, loop checking, and troubleshooting.
Typical Applications
The RDIOR400 is particularly suited to Kongsberg automation installations where field signals must be distributed away from the main controller.
Typical applications include:
- Marine automation systems
- Ship machinery monitoring and control
- Remote valve control
- Relay-based equipment control
- Engine-room automation
- Offshore automation systems
- Distributed digital I/O
- Remote equipment status monitoring
- Replacement of existing RIO400 field interface modules
Kongsberg describes the RIO400 system as a remote I/O solution for connecting field devices such as valves, relays, and sensors to a Kongsberg automation controller.
Installation & Configuration
Before installation, confirm that the replacement module has the correct part number, revision, and system configuration. Several RDIOR400 listings exist with different assembly revisions, including 3.1.0, 3.1.1, and later versions, so revision matching is important.
Recommended procedure:
- Isolate the relevant control-system power before removing the existing module.
- Record the module address and wiring arrangement.
- Verify SPBus A/B connections and field I/O wiring.
- Install the replacement module securely on the DIN rail.
- Reconnect the plug-in field connections.
- Confirm the supply voltage is within the specified 10–28.8 VDC range.
- Check the front status indication after energizing the system.
- Verify communication with the controller.
- Perform an I/O loop check before returning the system to service.
The RDIOR400 documentation specifically provides for loop checking and debugging from an operator station or local terminal.
Maintenance & Inspection
For installed units, routine inspection should focus on the actual operating environment and system behavior.
Check periodically for:
- Loose field wiring or SPBus connections
- Corrosion or contamination around terminals
- Abnormal status LED indications
- Communication errors
- Unexpected digital input states
- Relay output faults
- Evidence of overheating
- DIN-rail mounting security
- Grounding and shielding integrity
Because the module incorporates loop monitoring, watchdog functions, and self-diagnostics, recorded system alarms should be reviewed before replacing hardware unnecessarily.
Replacement Notes
When sourcing a replacement, do not rely only on the description “RDIOR400.” Confirm all identification information printed on the module, especially:
KONGSBERG / RDIOR400 / 600950 / Assembly Revision / Serial Number
The available documentation identifies 600950 as the Kongsberg Simrad RDIOR400 part number, while marketplace examples show multiple revisions of this hardware.
If replacing an older unit, compare the revision and system documentation before installation. A physically identical module is not automatically a configuration-equivalent replacement.
Identification
Brand: KONGSBERG
Model: RDIOR400
Part Number: 600950
Function: Remote Digital Input/Output and Relay Interface
System: Kongsberg RIO400 / SPBus
Mounting: DIN rail
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